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Heavy air pollution hits again. Yesterday during the day, Beijing’s air quality reached severe levels of pollution in a short period of time. The yellow warning for heavy air pollution was officially launched at midnight today. Today and tomorrow, Beijing will maintain a moderate to severe pollution level.
The Beijing Municipal Ecological Environment Monitoring Center stated that due to the combined effects of pollution accumulation and regional pollution, the level of air pollution in the city has gradually increased. Slightly polluted from day to night on the 8th, affected by weak disturbances on the morning of the 9th, weak north winds of short duration in the middle and lower layers, but superimposed on the pollution peak in the morning, the level of air pollution has increased. 18:00, the city’s air quality has maintained a high level of pollution.
According to the forecast of the China Environmental Monitoring Station, the Beijing-Tianjin-Hebei region will be dominated by unfavorable weather conditions with static and high humidity in the coming week, which will likely lead to the accumulation and transformation of pollutants. From March 9 to March 14, the Beijing-Tianjin-Hebei region and its surroundings are mainly controlled by weak atmospheric pressure, and there will be a calm, stable and high humidity climate. From night to dawn, there is temperature inversion near the ground in the area, and the intensity of the temperature inversion increases day by day, and the atmospheric diffusion capacity is greatly reduced, which will cause the accumulation of pollutants. At the same time, the relative humidity in the area is increasing day by day, generally reaching around 80% to 90%. With the last period of weak precipitation, high humidity conditions continue, accelerating the secondary conversion rate of gaseous pollutants, promoting the growth of particulate matter moisture absorption, and causing PM2.5 concentration increases rapidly.
At the same time, the industrial structure of the highly polluting, high-emission, high-energy-consuming Beijing-Tianjin-Hebei region has not fundamentally changed. Pollutant emissions are at a high level. When faced with adverse weather conditions, pollution processes are extremely prone to occur. According to information released by the National Statistics Office, the Manufacturing Purchasing Managers Index (PMI) in February was 50.6%, which was above the critical point for 12 consecutive months, indicating a high level of activity. productive.
Furthermore, the heating season in the northern region is not over yet and polluting emissions caused by heating remain relatively high. At present, the number of severely polluted days or more in my country throughout the year mainly occurs in the alternating period of winter and spring, concentrated in Beijing-Tianjin-Hebei and surrounding areas, the Fenwei Plain, the Northeast and the northwest.
Judging by the forecast of the Beijing Ecological Environment Monitoring Center, 10-11, the city and the region will maintain obvious adverse weather conditions of low pressure, weak south wind, high humidity and temperature inversion, and the quality air is expected to maintain moderate to heavy pollution. From the night of 11-12, the soil of the city weakened towards the northeast high pressure, which is expected to usher in a light rain throughout the city, when diffusion conditions will improve and air quality will improve. It will become a light pollution. level on the 12th.
Yesterday, the city held a video conference in which all departments were required to take multiple measures, strictly implement the yellow warning emissions reduction plan, and “trim spikes and slow down” to the greatest extent possible; At the same time, increase police inspections, create a high-pressure law enforcement situation, and guide society to govern and govern together. Take the initiative to reduce emissions.Return to Sohu to see more
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